While all signs now point to Mexico as the epicenter, the genetic material in the virus there includes part of a swine influenza virus of Eurasian origin.

• 尽管所有迹象都指出墨西哥是疾病爆发的中心，但这种病毒的基因物质里却包含了部分起源于欧亚大陆的一种猪流感病毒。